view mercurial/statichttprepo.py @ 2489:568e58eed096

Add revlog.parentrevs function.

This allows one to walk the revision graph using only revision numbers,
which can be faster than using revision hashes, especially for
RevlogNG, where the parents of a revision are stored as revision
numbers.

# statichttprepo.py - simple http repository class for mercurial
#
# This provides read-only repo access to repositories exported via static http
#
# Copyright 2005 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

from demandload import demandload
demandload(globals(), "changelog filelog httprangereader")
demandload(globals(), "localrepo manifest os urllib urllib2")

class rangereader(httprangereader.httprangereader):
    def read(self, size=None):
        try:
            return httprangereader.httprangereader.read(self, size)
        except urllib2.HTTPError, inst:
            raise IOError(None, inst)
        except urllib2.URLError, inst:
            raise IOError(None, inst.reason[1])

def opener(base):
    """return a function that opens files over http"""
    p = base
    def o(path, mode="r"):
        f = os.path.join(p, urllib.quote(path))
        return rangereader(f)
    return o

class statichttprepository(localrepo.localrepository):
    def __init__(self, ui, path):
        self.path = (path + "/.hg")
        self.ui = ui
        self.revlogversion = 0
        self.opener = opener(self.path)
        self.manifest = manifest.manifest(self.opener)
        self.changelog = changelog.changelog(self.opener)
        self.tagscache = None
        self.nodetagscache = None
        self.encodepats = None
        self.decodepats = None

    def dev(self):
        return -1

    def local(self):
        return False